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04/23/2009 at 01:50AM PDT, ID: 24348205
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3.8

DocumentListener returns BadLocationException

Asked by ai_chien in New to Java Programming

Tags: java, badlocationexception, exception, DocumentListener, DocumentEvent

Hi all,

I am using DocumentListener to trigger update from a textfield to another field. The concept is to add up values (from others/many textfields) to generate a "total" textfield. However, my "total" field is working well with document event INSERT, but it is not with REMOVE. The code is below and I'm not sure why REMOVE is being skipped and entered into Exception area. Any idea how to fix it? 
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//---------------------myDocumentListener--------------------------------------------------
public class myDocumentListener implements DocumentListener
{		
  public void insertUpdate(DocumentEvent evt)
  {	
     printInfo(evt); 		
  }
  public void removeUpdate(DocumentEvent evt)
  {
    printInfo(evt);
 }
 public void changedUpdate(DocumentEvent evt)
{
   printInfo(evt);
}
 
public void printInfo(DocumentEvent evt)
{
  try
  {
     int off = evt.getOffset(); //get index of newly keyed characters
     int len = evt.getLength(); //get length of newly keyed characters
     DocumentEvent.EventType type = evt.getType();
     System.out.println("--doc evt type--" + type);
     String typeString = null;
     String str = evt.getDocument().getText(off, len);
			
    if (type.equals(DocumentEvent.EventType.REMOVE))
    {
      int toff = evt.getOffset(); //get index of newly keyed characters
      int tlen = evt.getLength();
     String tstr = evt.getDocument().getText(off,len);
     System.out.println("--before remove str--" + tstr);
     myttl = myttl - Integer.parseInt(tstr);
     ttl.setText(String.valueOf(myttl));
   }			
  else if (type.equals(DocumentEvent.EventType.CHANGE))
  {
  }
  else if (type.equals(DocumentEvent.EventType.INSERT))
  {
     myttl = myttl + Integer.parseInt(str);
     ttl.setText(String.valueOf(myttl));
  }				
}
catch (BadLocationException e)
{
  System.err.println( e.fillInStackTrace());
 }
 }
}
//---------------------end of myDocumentListener--------------------------------------------------
 
Keywords: DocumentListener returns BadLocation…
Title
1 Temporary table creation and recordse…
 
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[+][-]04/23/09 02:06 PM, ID: 24219796

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[+][-]04/23/09 07:07 PM, ID: 24221221

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[+][-]04/24/09 01:43 AM, ID: 24222893

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[+][-]04/24/09 01:52 AM, ID: 24222935

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[+][-]04/24/09 02:07 AM, ID: 24223008

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About this solution

Zone: New to Java Programming
Tags: java, badlocationexception, exception, DocumentListener, DocumentEvent
Sign Up Now!
Solution Provided By: Venabili
Participating Experts: 1
Solution Grade: C
 
 
 
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